<?php
/**
 * crcl/base
 *
 * Copyright 2013 CRCL - André Sabosch - info@crcl.de
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

namespace crcl\base\template;

interface IValues
{
  public function set($key, $value);
  public function get($key);
  public function out($key);
}

class Values implements IValues
{
  public function set($key, $value)
  {
    $this->aValues[$key] = $value;
  }

  public function get($key)
  {

    $iPos = \strpos($key, '->');
    if ($iPos !== \FALSE)
    {
      $sKey = \substr($key, 0, $iPos);
      $oKey = $this->aValues[$sKey];
      $sReturn = $oKey->{\substr($key, $iPos+2)};
      return $sReturn;
    }
    else
    {
      if (isset($this->aValues[$key]))
      {
        return $this->aValues[$key];
      }
      else
      {
        throw new Exception('Missing value', Exception::ERROR_MISSINGVALUE,
          array('key' => $key, 'values' => $this->aValues));
      }
    }
  }

  public function out($sFrom)
  {
    $bFound = \FALSE;
    $sOriginal = $sFrom;
    foreach ($this->aValues as $key => $value)
    {
      $sSearchKey = '$' . $key;
      $iPos = \strpos($sFrom, $sSearchKey);
      if ($iPos !== \FALSE)
      {
        $bFound = \TRUE;
        $sFrom = \str_replace($sSearchKey, $this->get($key), $sFrom);
      }
    }
    if (!$bFound)
    {
      throw new Exception('Missing value', Exception::ERROR_MISSINGVALUE,
        array('key' => $sOriginal, 'values' => $this->aValues));
    }
    echo $sFrom;
  }

  /** PRIVATE *************************************************************************************/

  private $aValues = array();
}

//filter integrieren
//factory über typen? nicht notwendig, weil im tpl alles strings?
//format checks? zumindest bei array/obj
